Executing the Unix commands remotely by java program

[Prasad.koti]

Hi All,

I want to execute commands in putty remotely by java program.
Thru putty software,I am logging in to other machine and I want execute some commands(like unix commands) remotely by java program.
Please let me know how to achive this.

Thanks in advance

Regards
Prasad:

[RameshBowrisett]

You can write a socket program to connect telnet on port 25, and you can run all the commands through that on the remote machine. You can build a UI if required.

[Prasad.koti]

Hi RameshBowrisett,

I am using putty to connect the remote machine. After getting connected thru remote machine ,I am logging using username and password thereafter I am executing the UNix commands. Please can U provide one example.
Thanks for the reply .

Thanks and regards,
Prasad

[RameshBowrisett]

Here is the sample code, its very simple and quite easy.

Socket s = new Socket(RemoteServer, 25);
BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

out.write(UnixCommand + "\n"); ==> Here you can enter uid and pwd and other unix commands.

out.flush();

String res = in.readLine(); ==> here you will read the response from remote machine

Hope this will help you to go ahead and start.

Ramesh

System.out.println("UnixCommand response "+ res);

[Peter_APIIT]

Why you connect first before enter username and password ?

After login, you can invoke your program which is with UI, that program allow to execute Unix command.

[smachavo]

I am also working on similar problem. Below is my code, but I am not able to see any output. Please help!!

String username = args[0].substring(0, args[0].indexOf("@"));
String hostname = args[0].substring(args[0].indexOf("@") + 1,args[0].length());
// Create a connection to server
Socket s = new Socket(hostname, 25);
// Create input and output streams to socket
BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
wr.write(username + "\n");
wr.write(pwd + "\n");
wr.flush();
wr.write("/bin/sh -c ls -l");
wr.flush();
// Read response from socket
BufferedReader rd = new BufferedReader(new InputStreamReader(s.getInputStream()));
String line = rd.readLine();
while (line != null) {
   System.out.println(line);
   line = rd.readLine();
}
s.close();

[Hack]

Are you getting any errors or just no output?